Sinkhole risk in Richland County, ND: No soluble rock mapped

The next step for one property

No soluble bedrock is mapped here, so natural sinkholes are unlikely. Collapses from broken pipes or old mines are a separate risk.

Across 1,436 square miles, under one square mile of Richland County maps onto soluble rock. With about 16,658 residents (12 per square mile), much of the land is open, and the mapped rock may sit far from where people actually live. The figures come from 335 map points about 2.1 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: how these percentages are measured, and the warning signs that apply anywhere.

Counties around Richland County

The nearest county rated sinkhole country is Boyd County, NE, about 250 miles south. 2 of the 6 closest counties land in the same band; the ground changes quickly around here.

• Wilkin County, MN 23 mi east · 0% at surface
• Sargent County, ND 35 mi west · 0% at surface
• Ransom County, ND 36 mi west · under 1% at surface
• Traverse County, MN 41 mi southeast · 0% at surface
• Roberts County, SD 44 mi south · 0% at surface
• Marshall County, SD 48 mi southwest · 0% at surface

Against the rest of North Dakota

Richland County ranks 41 of 53 in North Dakota for soluble rock at the surface, and sits above 0% of US counties on that measure.

• Cavalier County 2%
• Ransom County under 1%
• Dunn County under 1%
• Barnes County under 1%
• Slope County under 1%